Fan housing for an air cooled engine



FIG. 1 is a front perspective view of a fan housing for an air cooled engine showing my design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a side elevation view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a fan housing for an air cooled engine, substantially as shown and described. 